<template>
  <div>
    <div class="shopcart">
      <div class="content" @click="toggleList">
        <div class="content-left">
          <div class="logo-wrapper">
            <div class="logo" :class="{'highlight': totalCount>0}">
              <i class="icon-shopping_cart" :class="{'highlight': totalCount>0}"></i>
            </div>
            <div class="num" v-show="totalCount>0">{{totalCount}}</div>
          </div>
          <div class="price" :class="{'highlight': totalPrice>0}">￥{{totalPrice}}</div>
          <div class="desc">另需配送费￥{{deliveryPrice}}元</div>
        </div>
        <div class="content-right" @click.stop.prevent="pay">
          <div class="pay" :class="payClass">
            {{payDesc}}
          </div>
        </div>
      </div>
      <transition name="fold">
        <div class="shopcart-list" v-show="listShow">
          <div class="list-header">
            <h1 class="title">购物车</h1>
            <span class="empty" @click="empty">清空</span>
          </div>
          <div class="list-content" ref="listContent">
            <ul>
              <li class="food" v-for="(food,index) in selectFoods" :key="index">
                <span class="name">{{food.name}}</span>
                <div class="price">
                  <span>￥{{food.price*food.count}}</span>
                </div>
                <div class="cartcontrol-wrapper">
                  <cartcontrol :food="food">
                  </cartcontrol>
                </div>
              </li>
            </ul>
          </div>
        </div>
      </transition>
    </div>
    <transition name="fade">
      <div class="list-mask" @click="hideList" v-show="listShow"></div>
    </transition>
  </div>

</template>

<script type="text/ecmascript-6">
  import cartcontrol from '../cartcontrol/cartcontrol';
  import BScroll from 'better-scroll';

  export default {
    props: {
      selectFoods: {
        type: Array, // 在vue里如果prop是个array或者object，default就要是个函数
        default() {
          return [];
        }
      },
      deliveryPrice: {
        type: Number,
        default: 0
      },
      minPrice: {
        type: Number,
        default: 0
      }
    },
    data() {
      return {
        fold: true
      };
    },
    computed: {
      totalPrice() {
        let total = 0;
        this.selectFoods.forEach((food) => {
          total += food.price * food.count;
        });
        return total;
      },
      totalCount() {
        let count = 0;
        this.selectFoods.forEach((food) => {
          count += food.count;
        });
        return count;
      },
      payDesc() {
        if (this.totalPrice === 0) {
          return `￥${this.minPrice}元起送`;
        } else if (this.totalPrice < this.minPrice) {
          return `还差￥${this.minPrice - this.totalPrice}元起送`;
        } else {
          return '去结算';
        }
      },
      payClass() {
        return this.totalPrice < this.minPrice ? 'not-enough' : 'enough';
      },
      listShow() {
        if (!this.totalCount) {
          return false;
        }
        let show = !this.fold;
        if (show) {
          this.$nextTick(() => {
              if (!this.scroll) {
                // eslint-disable-next-line
                this.scroll = new BScroll(this.$refs.listContent, {
                  click: true
                });
              } else {
                this.scroll.refresh();
              }
            }
          );
        }
        return show;
      }
    },
    methods: {
      toggleList() {
        if (!this.totalCount) {
          return;
        }
        this.fold = !this.fold;
        console.log(this.fold);
      },
      hideList() {
        this.fold = true;
      },
      empty() {
        this.selectFoods.forEach((food) => {
          food.count = 0;
        });
      },
      pay() {
        if (this.totalPrice < this.minPrice) {
          return;
        }
        window.alert(`支付${this.totalPrice}元`);
      }
    },
    components: {
      cartcontrol
    }
  }
  ;
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixin.styl"
  .shopcart
    position: fixed
    left: 0
    bottom: 0
    z-index: 50
    width: 100%
    height: 48px
    .content
      display: flex
      background: #141d27
      font-size: 0
      color: rgba(255, 255, 255, 0.4)
      .content-left
        flex: 1
        .logo-wrapper
          display: inline-block
          position: relative
          top: -10px
          margin: 0 12px
          padding: 6px
          width: 56px
          height: 56px
          box-sizing: border-box
          vertical-align: top
          border-radius: 50%
          background: #141d27
          .logo
            width: 100%
            height: 100%
            border-radius: 50%
            text-align: center
            background: #2b343c
            &.highlight
              background: rgb(0, 160, 220)
            .icon-shopping_cart
              line-height: 44px
              font-size: 24px
              color: #80858a
              &.highlight
                color: #fff
          .num
            position: absolute
            top: 0
            right: 0
            width: 24px
            height: 16px
            line-height: 16px
            text-align: center
            border-radius: 16px
            font-size: 9px
            font-weight: 700
            color: #fff
            background: rgb(240, 20, 20)
            box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.4)
        // 阴影效果,查css3 api
        .price
          display: inline-block
          vertical-align: top
          margin-top: 12px
          line-height: 24px
          padding-right: 12px
          box-sizing: border-box
          border-right: 1px solid rgba(255, 255, 255, 0.1)
          font-size: 16px
          font-weight: 700
          &.highlight
            color: #fff
        .desc
          display: inline-block
          vertical-align: top
          margin: 12px 0 0 12px
          line-height: 24px
          font-size: 12px
      .content-right
        flex: 0 0 105px
        width: 105px
        .pay
          height: 48px
          line-height: 48px
          text-align: center
          font-size: 12px
          font-weight: 700
          background: #2b333b
          &.not-enough
            background: #2b333b
          &.enough
            background: #00b43c
            color: #fff
    .shopcart-list
      position: absolute
      left: 0
      top: 0
      z-index: -1
      width: 100%
      transform: translate3d(0, -100%, 0)
      &.fold-enter-active, &.fold-leave-active
        transition: all .5s
      &.fold-enter, &.fold-leave-active
        transform: translate3d(0, 0, 0)
      .list-header
        height: 40px
        line-height: 40px
        padding: 0 18px
        background: #f3f5f7
        border-bottom: 1px solid rgba(7, 17, 27, 0.1)
      .title
        float: left
        font-size: 14px
        color: rgb(7, 17, 27)
      .empty
        float: right
        font-size: 12px
        color: rgb(0, 160, 220)
      .list-content
        padding: 0 18px
        max-height: 217px
        overflow: hidden
        background: #fff
        .food
          position: relative
          padding: 12px 0
          box-sizing: border-box
          border-top-1px(rgba(7, 17, 27, 0.1))
          .name
            line-height: 24px
            font-size: 14px
            color: rgb(7, 17, 27)
          .price
            position: absolute
            right: 90px
            bottom: 12px
            line-height: 24px
            font-size: 14px
            font-weight: 700
            color: rgb(240, 20, 20)
          .cartcontrol-wrapper
            position: absolute
            right: 0
            bottom: 7px

  .list-mask
    position: fixed
    top: 0
    left: 0
    width: 100%
    height: 100%
    z-index: 40
    backdrop-filter: blur(10px)
    background: rgba(7, 17, 27, 0.6)
    transition: all 0.5s
    /*&.fade-enter-active, &.fade-leave-active*/
    /*transition: all 0.5s*/
    &.fade-enter, &.fade-leave-active
      opacity: 0
      background: rgba(7, 17, 27, 0)
</style>
